The talk hasn't taken place yet, so I assume he posted it so people who are interested can attend.
Ahh... FTA:
> Students who are taking EE380 for credit and cannot attend the class live may view (and comment upon) another talk by the same speaker given in EE380 on Feb 13, 2008.
The talk took place almost two years ago, so it's a shame that Microsoft think that any information about Kinect is still under wraps, especially when you consider that it has several open source libraries and drivers now (iirc).